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Calculation of relative permittivity
Posted Jun 30, 2015, 5:44 a.m. EDT Low-Frequency Electromagnetics 1 Reply
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Hi,
I built a capacitor modeling in AC/DC module - elecric currents - frequency domain following the documentation. With the impedance that COMSOL calculated, I calculated the relative permittivity of the material between the plates of the capacitor. Theorically the result should equal to the value of permittivity that is used in the simulation. But in fact they are different, and what's worse, the result of the calculation changes with the variation of the distance between the two plates. There must be a problem in the modeling or in the expressions but I can't figure it out.
I built a capacitor modeling in AC/DC module - elecric currents - frequency domain following the documentation. With the impedance that COMSOL calculated, I calculated the relative permittivity of the material between the plates of the capacitor. Theorically the result should equal to the value of permittivity that is used in the simulation. But in fact they are different, and what's worse, the result of the calculation changes with the variation of the distance between the two plates. There must be a problem in the modeling or in the expressions but I can't figure it out.
1 Reply Last Post Jun 30, 2015, 6:48 a.m. EDT
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Posted:
9 years ago
I would like to attach my Comsol file but il's awlas warning "file size error"...